Peningkatan jerapan Zn(II) dan Pb(II) daripada sisa air dengan manik kitosan tertiol

Translated title of the contribution: Enhanced Zn(II) and Pb(II) removal from wastewater using thiolated chitosan beads (ETB)

Soon Kong Yong, Nanthi Bolan, Enzo Lombi, William Skinner

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Chitosan beads (E) was first prepared by phase inversion of chitosan acetate solutions. Thiolated chitosan beads (ETB) was synthesised by soaking E in a mixture of ethanol and carbon disulfide for 7 days and then rinsed thoroughly with water and ethanol. Sulfur content of ETB is 7.88 %. The thiolation process has increased the Brunauer-Emmett-Teller (BET) surface area of E beads from 39.5 m2/g to 46.3 m2 /g. ETB is categorised as macroporous material (pore aperture: 182 nm) with multiple and uniform porous layers. A new shoulder at 1594 cm -1 was found in Fourier Transform infrared spectroscopy (FTIR) spectra of ETB, is assigned to thiourea moiety and was confirmed by X-ray photoelectron spectroscopy (XPS) spectra. The Pb(II) sorption capacity by ETB was higher than E beads at all sorbent dosage (except 5.0 g/L). At sorbent dosage of 5.0 g/L, sorption capacity of Zn(II) by ETB was enhanced by 3.2 times as compared to E beads. Sorption data fitted well to linearised Freundlich isotherm model and Ho’s pseudo second order kinetic model. The higher KF value of ETB than E indicated greater sorption capacity. The increase in Zn(II) and Pb(II) sorption capacities were attributed to enhanced chemisorption with thiol group in ETB beads.

Translated title of the contributionEnhanced Zn(II) and Pb(II) removal from wastewater using thiolated chitosan beads (ETB)
Original languageOther
Pages (from-to)586-594
Number of pages9
JournalMalaysian Journal of Analytical Sciences
Volume19
Issue number3
Publication statusPublished - 2015
Externally publishedYes

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